As end users of medication safety interventions, consumers (e.g., patients, caregivers, families) are key research team members. This review summarizes studies on interventions developed and designed with consumers to improve medication safety in primary care. Consumers were involved in the planning and engagement stages of most studies, but less frequently involved in other stages, such as making decisions on the final product or outcomes. The authors recommend increased reporting of how consumers were involved, the types of consumers, and the impact and quality of their involvement.